146 Lucina

146 Lucina
A three-dimensional model of 146 Lucina based on its light curve.
Discovery[1]
Discovered byAlphonse Borrelly
Discovery date8 June 1875
Designations
(146) Lucina
Pronunciation/luːˈsaɪnə/[2] or as Latin Lūcīna[3]
A875 LC; 1950 CY
Main belt
Orbital characteristics[4][5]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc130.35 yr (47610 d)
Aphelion2.89945 AU (433.752 Gm)
Perihelion2.53641 AU (379.442 Gm)
2.71793 AU (406.597 Gm)
Eccentricity0.066786
4.48 yr (1636.6 d)
18.04 km/s
198.102°
0° 13m 11.863s / day
Inclination13.0947°
83.9692°
146.982°
Earth MOID1.53233 AU (229.233 Gm)
Jupiter MOID2.14062 AU (320.232 Gm)
TJupiter3.319
Physical characteristics
Dimensions132.21±2.4 km[5]
131.893 km[6]
Mass2.4×1018 kg
Mean density
2.0 g/cm3
Equatorial surface gravity
0.0369 m/s²
Equatorial escape velocity
0.0699 km/s
18.557 h (0.7732 d)
0.0531±0.002[5]
0.0496 ± 0.0107[6]
Temperature~169 K
C[6] (Tholen)
8.20,[5] 8.277[6]

146 Lucina is a main-belt asteroid that was discovered by Alphonse Borrelly on June 8, 1875, and named after Lucina, the Roman goddess of childbirth. It is large, dark and has a carbonaceous composition. The spectra of the asteroid displays evidence of aqueous alteration.[7]

Photometric observations of this asteroid made during 1979 and 1981 gave a light curve with a period of 18.54 hours.[8]

Two stellar occultations by Lucina have been observed so far, in 1982 and 1989. During the first event, a possible small satellite with an estimated 5.7 km diameter was detected at a distance of 1,600 km from 146 Lucina.[9] A 1992 search using a CCD failed to discover a satellite larger than 0.6 km, although it may have been obscured by occultation mask.[10] Further evidence for a satellite emerged in 2003, this time based on astrometric measurements.[11]

  1. ^ "Discovery Circumstances: Numbered Minor Planets". Archived from the original on 10 May 2008. Retrieved 22 June 2004.
  2. ^ Noah Webster (1884) A Practical Dictionary of the English Language
  3. ^ Lucina
  4. ^ "The Asteroid Orbital Elements Database". astorb. Lowell Observatory.
  5. ^ a b c d Cite error: The named reference JPL was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference Pravec2012 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Fornasier1999 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Schober1983 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Arlot1985 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Stern1992 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Kikwaya2003 was invoked but never defined (see the help page).